Top Republicans attack Donald Trump in Hillary Clinton advert

In her latest move against Republican leadership contender Donald Trump, Democrat presidential nominee Hillary Clinton has used top GOP members to attack the New York billionaire.

From Mitt Romney, former Republican presidential candidate, calling him a "phoney" to Carly Fiorina, former GOP presidential contender, accusing Mr Trump of being the man "who only seems to feel big when he's trying to make other people look small", Mrs Clinton's campaign team used clips of their attacks on Mr Trump in a video.

The mocking video begins with Mr Trump claiming he will be a "unifier" for the party and then goes on to share snippets of other top Republicans criticising Mr Trump.

Ted Cruz, the candidate who dropped out after Mr Trump won the Indiana primary on Tuesday, is seen calling the property billionaire a "bully" while another former candidate, Marco Rubio describes him as the "most vulgar person who aspired to the presidency".

Hillary Clinton is hoping to woo Republican-leaning voters to her camp as they despair of a Trump-led Republican PartyCredit:
AFP/Getty Images

Mrs Clinton is hoping to win over Republicans dismayed by the prospect of Mr Trump representing them and will probably hope that this video convinces GOPers and Republican-leaning voters that even their own politicians oppose Mr Trump.

On Wednesday, a top campaign aide to 2008 Republican nominee John McCain, gave his support to Mrs Clinton on Twitter. "I'm with her," said Mark Salter.

"Anything right now that would allow Donald Trump to become president is the wrong move, so the de facto result is that Hillary would win," Ben Howe said.

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As the fight between the two likely contenders in November's election becomes gets nastier, Mr Trump claimed there were "tremendous numbers of Democrats that have voted for me" in an interview with MSNBC.

"Hundreds and hundreds of people were coming in that were registered Democrats that wanted to vote for Donald Trump."

And on Wednesday, he told Fox News: “I think we’re going to beat Hillary Clinton. She’s horrible on the economy, horrible on jobs, she’s really horrible on the military.”